Oh morgan, I sooo know what you mean. This week I have been soo patient with my kids because I don't have someone behind me, either frustrated/annoyed with me, or with the kids. Then the cycle starts, he's annoyed, I'm annoyed/hurt, take it out on the kids, then they become annoying (LOL), and it gets worse. There has been NONE of that this week with him on his trip. H is very patient when it comes to the girls when I am not around, but I am his trigger, his resentment, his annoyance. Doesn't make a person feel good.
I second ALL you said about H and trying to be friendly or even friends, but it doesn't work. At least not right now. I am where you are, I see us together in the future, but sometimes I see us apart, not quite sure we can survive this, or even if H is ever going to want to try.